Fanfiction has existed as a form of art for decades. It allows fans to express their love for their favorite characters, books, TV shows, and movies through telling their own stories set in these universes. Posting fanfiction on the internet has become a staple of fandom culture, with various websites catering to this community. Here are some of the best websites on which to post your fanfiction:

1. Fanfiction.net: One of the original fanfiction websites, fanfiction.net (also known as FFN) has been around since 1998. It is home to a vast collection of fan fiction from various fandoms, with over two million stories published on the site. The website is easy to use and navigate, has a robust search engine, and allows for easy uploading and editing of stories. FFN also has strict content guidelines, which include no explicit sexual content, graphic violence, or hate speech.

2. Archive of Our Own (AO3): Founded in 2008, AO3 has become one of the largest fanfiction websites, with over six million fanworks published on the site. It provides a more inclusive space for fanfiction writers, with a tag system that allows for better representation of marginalized identities and themes. The website is known for its user-friendly interface, easy to navigate system, and in-depth archives of fandoms.

3. Wattpad: Wattpad is a popular platform for both fanfiction and original content. It has a large user base, with over 80 million readers and writers worldwide. Wattpad is known for its mobile app, which allows for easy reading and writing on the go. The website also offers a variety of tools and resources for writers, including writing prompts, contests, and forums for feedback.

4. Tumblr: While not specifically a fanfiction site, Tumblr has a robust fandom culture and is a popular platform for posting fanfic. Many writers on Tumblr create story-based blogs, where they can share their fanfiction, art, and other fan work. Tumblr is a great platform for sharing visual fan works, such as fan art, and allows for easy communication with other fans.

5. DeviantArt: Similarly, DeviantArt is a platform where artists and writers can share their fan work. The website is known for its high-quality visual art, but it also has a dedicated fanfiction community. DeviantArt offers a wide variety of creative tools and resources, making it an ideal platform for multimedia fanfiction.

In conclusion, there are many websites on which to post your fanfiction, each with their own strengths and features. Whether you’re looking for a large and established website like FFN or AO3, or a more social media-based platform like Tumblr or DeviantArt, there’s a website out there for every fanfiction writer’s needs. Happy writing!